作　　者： ; ;

机构地区： 华南理工大学

出　　处： 《华南理工大学学报（自然科学版）》 2007年第3期111-116,131,共7页

摘　　要： 采用数值方法对群桩-承台体系的动力阻抗进行了分析.根据两个不同规模的群桩-承台体系的动力阻抗计算结果,发现在结构抗震所重点关注的低频段,群桩-土体-承台的动力相互作用与频率的相关性较小,因此可采用群桩-承台的静力相互作用关系代替其动力相互作用关系计算群桩-承台体系的动力阻抗.文中通过若干算例近似得到了群桩-承台的静力相互作用关系,并给出了利用群桩和承台的动力阻抗计算群桩-承台体系水平、摇摆和水平-摇摆耦合动力阻抗的简化计算公式. In this paper, numerical procedures are first adopted to analyze the impedance of pile group-slab system. Based on the calculated impedance of two pile group-slab systems with different configurations, it is found that the dynamic interaction in the pile group-soil-slab system has low frequency dependence during the low-frequency vibration that is most concerned in the aseismatie design, so that, in the calculation of impedance of the pile group- soil-slab system, the dynamic interaction can be replaced by the static interaction. Based on the above-mentioned results, the static interaction in the pile group-slab system is then obtained via illustrations, and some simplified formulae for calculating the lateral, rocking and cross-lateral-rocking impedances of the system are presented.

关 键 词： 桩基 承台 动力相互作用 动力阻抗

领　　域： [建筑科学] [建筑科学]